Feb 15th 2023 update

external/graphqlparser/ast/c_impl.py

@@ -0,0 +1,61 @@
+# Copyright 2019-present, GraphQL Foundation
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+from c import field_prototype, return_type, struct_name
+from casing import title
+from license import C_LICENSE_COMMENT
+
+class Printer(object):
+  '''Printer for the implementation of the pure C interface to the AST.
+  '''
+
+  def __init__(self):
+    self._current_type = None
+
+  def start_file(self):
+    print C_LICENSE_COMMENT + '''/** @generated */
+
+#include "GraphQLAst.h"
+#include "../Ast.h"
+
+using namespace facebook::graphql::ast;  // NOLINT
+'''
+
+  def end_file(self):
+    pass
+
+  def start_type(self, name):
+    self._current_type = name
+
+  def field(self, type, name, nullable, plural):
+    print field_prototype(self._current_type, type, name, nullable, plural) + ' {'
+    print '  const auto *realNode = reinterpret_cast<const %s *>(node);' % self._current_type
+    title_name = title(name)
+    call_get = 'realNode->get%s()' % title_name
+    if plural:
+      if nullable:
+        print '  return %s ? %s->size() : 0;' % (call_get, call_get)
+      else:
+        print '  return %s.size();' % call_get
+    else:
+      if type in ['string', 'OperationKind', 'boolean']:
+        print '  return %s;' % call_get
+      else:
+        fmt = '  return reinterpret_cast<const struct %s *>(%s%s);'
+        print fmt % (struct_name(type), '' if nullable else '&', call_get)
+
+    print '}'
+
+  def end_type(self, name):
+    pass
+
+  def start_union(self, name):
+    pass
+
+  def union_option(self, option):
+    pass
+
+  def end_union(self, name):
+    pass